| A | B |
|---|
| Veins | Blood vessels that carry blood back to the heart. |
| Arteries | Blood vessels that carry blood away from the heart. |
| Capillaries | Tiny, thin- walled blood vessels that allow the exchange of gases and nutrients between the blood and cells and are located between arteries and veins. |
| Red blood cells | Transport oxygen from the lungs to the tissues. |
| Hemoglobin | A protein in the blood that gives blood its red color. |
| White blood cells | Responsible for protecting the body from agents of disease in the bloodstream. |
| Bronchial tubes | Tubes in the lungs that carry air. |
| Bronchioles | At the end of the bronchial tubes. |
| Alveoli | Little sacs at the end of bronchioles where most of the "action" takes place. |
| Larynx | Often called the "voice box". Contains the vocal cords. |
| Xylem | Tube in a blant that transports water up from the roots to the rest of the parts of the plant. |
| Phloem | Tubes in a plant that are responsible for carrying food from the leaves to the rest of the plant. |
